wands



(No Model.) 5

J. 0. WANDS.

ROTARY ENGINE. No. 271,555. Patented Jan.30,1883.

UNITED STATES PATENT @rrrcn.

JOHN C. WANDS, OF ST. LOUIS, MISSOURI.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 271,555, dated January 30, 1883.

Application filed December 9, 1882.

To all whom it mag) concern.-

Be it known that I, JOHN G. WANDS, a citizen of the United States, residing at St. Louis,

fication.

Figure 1 of the drawings is a representation of a vertical sectional View ofmy engine. Fig. 2' is a cross-sectional view of the same, and Fig. 3 is a detail view.

This invention has relation to rotary engines; and it consists in the construction and novel arrangement of parts, as will be hereinafter fully described and specifically claimed.

The object of this invention is to provide a rotary engine of great power, wherein the steam will be worked by expansion, speed being obtained by gearing up from the main shaft.

In the accompanying drawings, the letters A A designate twin cylinders, usually cast with open inner ends and bolted to the center partition, 0. are independently cast and bolted to the main cylinders A, in which the piston-head rotates.

D represents the main shaft, extending through bearings a in the cylinder-walls and center plate. To this shaft are keyed the hollow cylinder piston-heads E, each of which is provided with an eccentric. bulge or pistonblock, F, which is usually bolted to the wall of the cylinder-head. In position the pistons or steam-bearings F are balanced, being diametrically opposite to each other on the two piston-heads. The cylindrical valve-seats B are open at the bottom, and when bolted to the tops of the piston-cylindersA form offsets thereof, communicating therewith through the openings G.

In the upper portion of each valve-chamber B is provided the exhaust-passage H, and in The cylindrical valve-seats By the main shaft revolves.

insure steam-tight joints.

(No model.)

the lateral cylindrical wall of the chamber B, near the opening G, is formed the steam-passage K. Y

L L indicate the steam-valves, which are seated in the steam-chain bers. Each valve has a rectilinear or curved reciprocating motion,

and is formed with an angular or V-shaped steam-passage through it. In the construction illustrated the valve is sector-shaped and pivoted to the heads of the valvechamber, at the centers thereof. The valve is a gravitating valve, and when inits lowest position rests on the cylindrical surface of the piston=head E, its steamway then communicating with the supplyoat the portK in the steam-chamber and with the chamber of the piston-cylinder, into which the steam is directed, forcing the piston-head to revolve. When the piston-offset F, in the revolution of the piston-head, engages the valve, the latter, acting as an abutment, is lifted by the inclined front end of said piston-offset and closes entirely into the valvechamber, cutting off the live'steam for a moment, until the piston has passed by and the exhaust has operated.

In connection with the steam-supply is provided in the pipe P a cylinder-shaped valveseat, S, in which is located a vibratory cylinder-valve, V, having a diametric steamway, 20. By means of an external crank-arm, k, and a rod, It, the cut-off valve is connected to a spring-arm, Z, which is attached to the external wall of the piston-cylinder near the main shaft, and is curved to engage a cam, Z, on the main shaft. This cut-oft valve is in this manner easily operated by the spring and cam as \Vhile the piston in one cylinder is under full head of steam that in the opposite cylinder passes under the abutmerit-valve, so that a dead-center is avoided.

The valves should be provided with packing-springs on the front and at each side to The piston heads or drums should be provided with packing-- rings on the sides, the samebeing usually set in recesses in the cylinder-walls, as indicated in the drawings.

the main shaft, acting, in connection with said to spring, to operate the cut-off valve, substan- Having described this invention, what I claim and desire to secure by Letters Patent,

istially as specified.

A rotary steam-engine having twin piston- In testimony whereof I afiix my signature in cylinders, pistons, and valve-chambers offset presence of two witnesses.

from said piston-cylinders, the vibratory gravi- JOHN CLARK WANDS. tating abutment valves carrying angular \Vitnesses:

steamways, and the cylinder cut-off valve, its crank connecting-rod, spring, and the cam on J AMES CAMPBELL, \VM. F. REED. 

